I'm gong to continue to blame Patterson. This entire episode could have been avoided if he'd bothered to appoint a Lt. Gov. sometime in the 15 months he's been in office, as the vacancy was what allowed the senator from the Bronx to claim two votes. Knowing that the balance was that close and not filling the seat is ridiculous.
Given the uproar over Sanford's disappearance, you'd think more people would be demanding that he appoint someone, although most people probably aren't aware that it wasn't automatically filled by someone when he stepped up.